Parameter number does not exist (Register 0007)

What does 00 mean?

The parameter number specified in the Modbus request to Holding Register 0007 does not correspond to an existing parameter in the drive's memory map. This means an invalid or misspelled parameter was addressed via the communication interface.

• Incorrect parameter number specified in the Modbus Read Holding Registers (Function Code 03) or Write Single Register (Function Code 06) command targeting Holding Register 0007.
• Typographical error in the PLC or HMI program mapping for the drive's Modbus address table.
• Attempting to access a parameter that exists on a different drive model or firmware version than the one connected.
• The parameter in question requires a sub-index (e.g., for an array parameter like Parameter 15-05[1]) and is being accessed without one.
• Corruption in the Modbus communication frame leading to misinterpretation of the requested parameter address.

Click steps to track your progress.

1. 1

   Verify the exact parameter number (e.g., Parameter 1-00) in the drive's communication manual or programming manual.

2. 2

   Review the Modbus master's (e.g., PLC, HMI) program to ensure the correct parameter address is being sent to Holding Register 0007.

3. 3

   Check the drive's firmware version (e.g., Parameter 15-05) and ensure the parameter map being used is compatible with that version.

4. 4

   If accessing an array parameter (e.g., a multi-level list), ensure both the main parameter number and the correct sub-index are specified in the Modbus request.

5. 5

   Temporarily use a Modbus scanner tool to manually test reading/writing known good parameters to verify communication integrity.